Wang Yan-Rong, Sha Zhong-Li
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China University of Chinese Academy of Sciences, Beijing 100049, China.
Zootaxa. 2017 Jan 25;4226(1):zootaxa.4226.1.7. doi: 10.11646/zootaxa.4226.1.7.
One new species of alvinocaridid Alvinocaris kexueae sp. nov. is described from hydrothermal vents on the Manus Basin, Southwest Pacific. This is the fifteenth species in Alvinocaris Williams & Chace, 1982. The new species is easily recognized by the combination of the rostrum distinctively overreaching the distal end of the antennular peduncle, and the armature of its dorsal and ventral margins; the unarmed third abdominal segment, and by the posterior margin of the telson having one triangular tooth medially and 6 pairs unequal spines. It is morphologically most similar to A. brevitelsonis Kikuchi & Hashimoto, 2000 described from Minami-Ensei Knoll, Okinawa Trough, but can easily be distinguished from it by the proportionally longer rostrum, by the dorsal teeth of the rostrum, by the shape of the chela of the first pereiopod, and by the teeth on the fourth abdominal segment. The genetic divergence of COI gene analyzed clearly supports the new taxon.
描述了一种来自西南太平洋马努斯盆地热液喷口的新种阿尔文虾科（Alvinocaridid）虾类——科学阿尔文虾（Alvinocaris kexueae）。这是阿尔文虾属（Alvinocaris Williams & Chace，1982）中的第15个物种。该新物种很容易通过以下特征组合来识别：吻部明显超过触角柄节远端，其背腹边缘具刚毛；第三腹节无武装，尾节后缘中部有一个三角形齿和6对不等长的刺。在形态上，它与2000年描述于冲绳海槽南恩塞伊海丘的短尾阿尔文虾（A. brevitelsonis Kikuchi & Hashimoto）最为相似，但可以通过相对较长的吻部、吻部的背齿、第一对步足螯的形状以及第四腹节上的齿很容易地将它们区分开来。对细胞色素氧化酶亚基I（COI）基因的遗传分化分析清楚地支持了这个新分类单元。
